is that the options fortheobamaadministrationinsyria would remain somewhat limited. the movement of these weapons all known to u.s. intelligence was first reported in the "new york times." officials confirmed it to fox news if president assad uses these weapons, american retaliatory options could range from subversive covert actions to the arming of syrian rebels to the direct use of force. >> their actions against their own people have been tragic but there is no doubt that there is line between even the horrors that they have already inflicted on the syrian people and moving to what would be internationally condemned step of utilizing their chemical weapons. >> that was secretary clinton speaking in prague today but keeping it vague as you saw shep as to what washington might do about it. >> this isn't the first time that the president and the secretary of state have drawn this red line. >> no, it's not. and critics of the obama administration warn that setting such a high bar to greater u.s. involvement in that conflict, namely the waging of chemical war by a nation against its own citizenry c